Qt Gui expects that the platform sends DPR update notifications if the DPR value has changed, before sending expose/paint events or delivering update request events. The most straightforward implementation is to send the DPR update event unconditionally and let Qt Gui determine if the DPR value has changed, especially if the native platform does not provide DPR change events. Pick-to: 6.6 Change-Id: Ica7a24a458b3b01f1c7b2e1e09d342114dc71331 Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io> (cherry picked from commit b8584173ab6a3fc4e034bc237b34f4968528b0f3) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
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